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I am currently trying to design a circuit with TTL level input (controllable by micro controller) controlling a buffer which can allow negative rail output (up to N8V) and gnd. I tried simple buffer but instantly blew (as expected). Even tried opamp and a transistor switch type circuit even that blew. I even tried searching the product list with no luck for some IC which can directly pass negative rail by some controlling method.
I even tried using power on-off pin on negative voltage supply IC and even negative rail LDO, but i need this circuit to work at 10Mhz.
What I wanted to know is there any way I can pass negative rail through a buffer or any other circuit and make it work that fast.
Also is there any way other to get this done?
PS:: I don't know if i have put this in the correct forum. sorry in advance.
Cd4016 is a switch that can work at +/- voltage. there are several others in the CD4XXX line of parts.
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In reply to Chris Cockrill:
I checked the datasheet it specifies voltage range on the input as 0V to Vcc.
I need to pass N8V on the buffer. nowhere does it specify that you can pass Negative voltage levels on the same.
Please can you clarify??
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